EP3132302B1 - Eyeglass lens for a display device, which display device can be placed on the head of a user and produces an image - Google Patents
Eyeglass lens for a display device, which display device can be placed on the head of a user and produces an image Download PDFInfo
- Publication number
- EP3132302B1 EP3132302B1 EP15717859.1A EP15717859A EP3132302B1 EP 3132302 B1 EP3132302 B1 EP 3132302B1 EP 15717859 A EP15717859 A EP 15717859A EP 3132302 B1 EP3132302 B1 EP 3132302B1
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- EP
- European Patent Office
- Prior art keywords
- spectacle lens
- coupling
- reflecting layer
- lens according
- section
- Prior art date
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- 238000002310 reflectometry Methods 0.000 claims description 22
- 230000003287 optical effect Effects 0.000 claims description 14
- 238000010521 absorption reaction Methods 0.000 claims description 9
- 238000003384 imaging method Methods 0.000 claims description 8
- 230000007704 transition Effects 0.000 claims description 6
- 230000004048 modification Effects 0.000 description 11
- 238000012986 modification Methods 0.000 description 11
- 210000003128 head Anatomy 0.000 description 7
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 208000029091 Refraction disease Diseases 0.000 description 5
- 230000004430 ametropia Effects 0.000 description 5
- 238000011161 development Methods 0.000 description 5
- 230000018109 developmental process Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 208000014733 refractive error Diseases 0.000 description 5
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- 238000004026 adhesive bonding Methods 0.000 description 1
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- 230000000694 effects Effects 0.000 description 1
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Images
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B27/0172—Head mounted characterised by optical features
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C11/00—Non-optical adjuncts; Attachment thereof
- G02C11/10—Electronic devices other than hearing aids
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
- G02B2027/0118—Head-up displays characterised by optical features comprising devices for improving the contrast of the display / brillance control visibility
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B2027/0178—Eyeglass type
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/34—Optical coupling means utilising prism or grating
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C2202/00—Generic optical aspects applicable to one or more of the subgroups of G02C7/00
- G02C2202/16—Laminated or compound lenses
Definitions
- the present invention relates to a spectacle lens for a display device that can be placed on the head of a user and generates an image
- the spectacle lens having a front side and a rear side, a coupling-in section and a coupling-out section spaced from the coupling-in section, and a light guide channel which is suitable for capturing light bundles from pixels of the generated image, which are coupled into the spectacle lens via the coupling section of the spectacle lens, in the spectacle lens to the coupling-out section from which they are coupled out of the spectacle lens, the light guide channel having a first reflective layer that extends from the coupling section to the coupling-out section and on which the light bundles are reflected for guidance up to the coupling-out section.
- the EP 2 343 591 A1 , WO 2010/034639 A2 , US 2013/0163089 A1 , U.S. 5,369,415 A , US 2007/0008624 A1 and the US 7 513 674 B1 each show a spectacle lens for a display device that can be placed on the head of a user and generates an image, the spectacle lens having a front side and a rear side, a coupling-in section and a coupling-out section spaced from the coupling-in section, and a light guide channel which is suitable for light bundles from pixels of the generated Images that are coupled into the spectacle lens via the coupling-in section of the spectacle lens are guided in the spectacle lens to the coupling-out section from which they are coupled out of the spectacle lens.
- the US 2008/094586 A1 shows a spectacle lens with the features of the preamble of claim 1.
- the DE 39 04 640 A1 describes an optical viewfinder system for cameras with a half mirror, which is formed by reflective and transparent sections arranged alternately next to one another.
- the object of the invention to develop a spectacle lens of the type mentioned at the beginning in such a way that the optically striking difference between the light guide channel on the one hand and the rest of the spectacle lens on the other hand is reduced.
- the object is achieved in that the first reflective layer has a plurality of transparent gaps spaced from one another.
- the transmissivity of the light guide channel is increased compared to a solution in which the reflective layer is continuous.
- the reflective layer can be segmented and have reflective segments separated from one another by the plurality of gaps.
- the multiple gaps can be dated in a first direction
- the coupling-in section towards the coupling-out section and / or be spaced apart transversely to the first direction.
- the plurality of gaps can be arranged equidistantly in a predetermined direction (e.g. the first direction and / or transverse thereto). However, this is not absolutely necessary. There can also be irregular intervals.
- the at least one gap can be circular, oval, or polygonal. However, any other geometric shape is also possible.
- an angle-selective absorption layer can be arranged outside the light guide channel in front of the at least one gap in the first reflective layer, which absorbs light that strikes the absorption layer at an angle from a predetermined first critical angle up to 90 ° and absorbs light that falls below an angle of 0 ° up to a predetermined second critical angle, which is less than or equal to the first critical angle, is transmitted.
- a bundle of light emerging from the light guide channel through the gap can be absorbed immediately. This has the advantage that this bundle of light cannot lead to undesired scattered light, which could occur if the bundle of light is further reflected at e.g. a material boundary in the direction back to the light guide channel.
- a transition region can be formed between the at least one gap and the reflective layer, in which the reflectivity increases in the direction from the gap to the reflective layer.
- the increase can in particular be continuous and / or constant.
- the light guide channel can have a second reflective layer opposite the first reflective layer.
- the second reflective layer can also have at least one transparent gap.
- the at least one transparent gap in the first reflective layer can be opposite a transparent gap in the second reflective layer.
- the two opposing reflective layers can be formed identically. In particular, they can be designed to be congruent.
- the first reflective layer can be planar or curved. The same is true for the second reflective layer.
- the reflective layer is in particular a mirror layer which has a reflectivity of 100% or almost 100% for visible light.
- the reflective layer it is also possible for the reflective layer to be designed as a partially transparent layer.
- the at least one gap can preferably have a transmission of 100% or almost 100% for light from the visible wavelength range.
- the transmissive gap it is also possible for the transmissive gap to be designed as a partially transparent layer which has a certain reflective property. In any case, however, the reflective property of the transmissive gap is lower than that of the reflective layer. The reflectivity of the reflective layer is therefore always higher than the reflectivity of the gap or gaps.
- Both the reflective layer and the region of the gaps can each be designed as a metallic layer or metallic coating. It is also possible for the reflective layer and the gaps to be formed in such a way that a polarization-dependent reflection is present. In particular, light bundles of a first polarization state can be reflected (at least partially reflected) and a second polarization state that is orthogonal to the first polarization state can be transmitted.
- the front side and / or the rear side can be curved.
- the rear side can have a curvature which is selected in such a way that ametropia correction is effected. This leads to the advantage that the desired ametropia correction is also present for the coupled out light bundles, since these are coupled out in such a way that they exit the spectacle lens via the rear side.
- the spectacle lens according to the invention can have multiple shells and, for example, have an inner shell and an outer shell.
- the inner and outer shells are made from the same materials.
- the inner shell can be connected to the outer shell over a large area (e.g. glued or cemented with an optical cement or optical adhesive).
- the sides of the inner and outer shell that face one another are preferably designed to be complementary to one another.
- these sides facing each other can be spherically curved.
- outside and / or the inside can be spherically curved.
- the coupling-out section can have a plurality of reflective deflecting surfaces arranged next to one another.
- the reflective deflecting surfaces can also be referred to as reflective facets. They can have a reflectivity of almost 100% and in this case are referred to as mirror surfaces. It is also possible that they have a lower reflectivity and are thus designed to be partially transparent.
- the reflective deflecting surfaces can each be designed to be planar or curved. Furthermore, the deflection surfaces can simulate a curved reflection surface in a Fresnel-like manner, which in addition to a pure beam deflection also has an imaging property.
- the coupling-out section can be buried in the spectacle lens.
- the coupling-out section can be designed such that the front side of the spectacle lens is a smooth, continuous surface.
- the coupling-in section can be formed in an edge region of the spectacle lens and the coupling-out section can be formed in a central region of the spectacle lens.
- the inner shell and the outer shell can each be formed in one piece. However, it is also possible for the inner shell and / or the outer shell (and / or any further shells) to be formed in several pieces.
- a display device with a holding device that can be placed on the head of a user, an image generation module attached to the holding device that generates an image, and imaging optics attached to the holding device, which has a spectacle lens according to one of the above claims and which contains the generated image maps the state of the holding device placed on the user's head in such a way that the user can perceive it as a virtual image.
- the imaging optics can have the spectacle lens as the only optical element.
- the imaging optics can include at least one further optical element in addition to the spectacle lens.
- the outer shell can be formed in one piece together with the at least one further optical element.
- the outer shell with the at least one further optical element e.g. by cementing or gluing.
- the at least one further optical element can be spaced apart from the outer shell.
- the at least one further optical element can be, for example, collimation optics, which are arranged between the spectacle lens and the image generation module, so that the light bundles from the image generation module can be coupled into the spectacle lens as collimated bundles.
- the display device can have a control unit which controls the image generation module.
- the image generation module can in particular have a planar image generator, such as an LCD module, an LCoS module, an OLED module or a tilting mirror matrix.
- the imager may have a plurality of pixels that may be arranged in rows and columns, for example.
- the imager can be self-luminous or non-self-luminous.
- the image generation module can in particular be designed in such a way that it generates a monochromatic or a multicolor image.
- the display device according to the invention can have further elements known to the person skilled in the art which are necessary for its operation.
- the display device 1 comprises a holding device 2 which can be placed on the head of a user and which can, for example, be designed in the manner of a conventional spectacle frame, as well as a first and a second spectacle lens 3, 4 which are attached to the holding device 2.
- the holding device 2 with the spectacle lenses 3, 4 can be designed, for example, as sports glasses, sunglasses and / or glasses for correcting ametropia, whereby the user can be shown a virtual image in his field of view via the first spectacle lens 3, as will be described below.
- the display device 1 comprises an image generation module 5, which can be arranged in the area of the right temple of the holding device 2, as in FIG Fig. 1 is shown schematically.
- the image generation module 5 can be a flat image generation element 6 ( Fig. 2 ), such as an OLED, a CMOS or an LCoS chip or a tilting mirror matrix, with a large number of pixels arranged, for example, in columns and rows.
- the spectacle lenses 3 and 4 and in particular the first spectacle lens 3 are only described together with the display device 1 according to the invention by way of example.
- the spectacle lenses 3, 4 or at least the first spectacle lens 3 are each designed as a spectacle lens 3, 4 according to the invention or as an optical element according to the invention.
- the optical element according to the invention can also be used in a context other than with the display device 1 described here. Therefore, if the optical element is designed as a spectacle lens, it can of course also be designed as a second spectacle lens 4.
- the display device 1 has imaging optics 7 which contain an optics element 8 arranged between the image generating element 6 or the image generator 6 and the first spectacle lens 3. Furthermore, the first spectacle lens 3 itself also serves as part of the imaging optics 7.
- a light beam 9 can emanate from each pixel of the image generator 6.
- a control unit 10 which can be part of the image generation module 5, the desired image can be generated.
- Fig. 2 the beam path of a light beam is shown as a representative of the light bundle 9, so that the light beam 9 is also referred to below.
- the light beam 9 emanating from the imager 6 runs through the optical element 8 and enters the first spectacle lens 3 via a coupling section 11 (here the end face of the first spectacle lens 3) and is in this along a light guide channel 12 up to a Outcoupling section 13 out.
- the decoupling section 13 has a plurality of reflective deflecting surfaces 14 arranged next to one another (which can also be referred to as reflective facets) on which the light rays 9 are reflected in the direction of a rear side 15 of the first spectacle lens 3, so that the light rays 9 over the rear side 15 emerge from the first spectacle lens 3.
- a user wears the display device 1 according to the invention on his head as intended, he can perceive the image generated by means of the imager 6 as a virtual image when he looks at the coupling-out section 13.
- the user must look to the right by approx. 40 ° in relation to the viewing direction G of a straight ahead view.
- Fig. 2 the pivot point 16 of the user's eye as well as the eyebox 17 or the exit pupil 17 of the imaging optics are shown for clarity.
- the eyebox 17 is the area which is provided by the display device 1 and in which the user's eye can move and he can still see the generated image as a virtual image.
- the coupling is carried out via the end face of the first spectacle lens 3 and thus the coupling section 11 is formed on the end face of the first spectacle lens 3, it is also possible to carry out coupling over the rear side 15 of the first spectacle lens.
- both the rear side 15 and the front side 18 of the first spectacle lens 3 are curved.
- the first spectacle lens 3 is also designed with two shells and comprises an outer shell 19 and an inner shell 20.
- the light guide channel 12 has two opposing reflective layers 21, 22, which each extend from the coupling-in section 11 to the coupling-out section 13.
- the first reflective layer 21 is formed on the rear side 15.
- the second reflective layer 22 is formed between the inner shell 20 and the outer shell 19.
- the first reflective layer 21 is not formed as a continuous layer between the coupling-in section 11 and the coupling-out section 13, but rather as a segmented layer.
- the first reflective layer 21 thus has reflective segments 23 which are spaced apart from one another in a first direction from the coupling-in section 11 to the coupling-out section 13, so that there are gaps 24 between the reflecting segments 23 available. No material of the reflective layer 21 is applied in these gaps 24. The gaps 24 are thus transparent.
- the second reflective layer 22 has, in the same way as the first reflective layer 21, reflective segments 25 with gaps 26 provided between them.
- the reflective segments 23 and 25 of the two reflective layers 21, 22 are arranged so that they are opposite one another.
- the gaps 24 and 26 are therefore also opposite one another and thus form transparent areas which run through the two reflective layers 21 and 22.
- the light bundles 9 are guided by reflections on the reflective layers 21 and 22 or on the corresponding reflective segments 23 and 25 from the coupling-in section 11 to the coupling-out section 13.
- the light bundles are then deflected in the direction of the rear side 15 by reflection on the facets 14 in such a way that they are coupled out of the first spectacle lens 3.
- ambient light 27 can pass through the light guide channel 12 and can be perceived by the user when the display device 1 is attached.
- the reflective layers 21, 22, the front side 18, the rear side 15 and the coupling-out section 13 are shown in FIG Fig. 4 each plan shown. In fact, in the embodiment described, they are curved. In a modification, however, the reflective layer 21, the reflective layer 22, the front side 18, the rear side 15 and / or the coupling-out section 13 can be designed flat. The non-planar layers and / or sides are then curved.
- the transmission of the light guide channel 12 can thus be adjusted through the size and arrangement of the reflective segments 23, 25 and thus through the size and arrangement of the gaps 24, 26.
- the surroundings can still be perceived by a user even in the area of the light guide channel 12.
- the transmission through the light guide channel results essentially from the ratio of the area of the reflective segments 23 and 25 to the area of the gaps 24 and 26 and from the relative arrangement of the reflective segments 23 of the first reflective layer to the reflective segments of the second reflective layer 22nd
- Fig. 5 is in the same way as in Fig. 4
- Another embodiment is shown in a sectional view, which differs from the previously described embodiment in particular in that an angle-selective absorption layer 28 is arranged outside the light guide channel 12 in front of the gaps 24 of the second reflective layer 21.
- This serves to suppress stray light.
- a light bundle 9 ′ can hit the curved front side 18 through a gap 26 and be reflected back from this in the direction of the light guide channel 12.
- This light bundle 9 ′ can then strike the absorption layer 28 at an angle such that it is absorbed by the latter and does not re-enter the light guide channel.
- the angle-selective absorption layer is designed so that it is transmissive for an angle of incidence from 0 ° up to a predetermined first critical angle and for an angle of incidence greater than a predetermined second critical angle, which is greater than or equal to the first critical angle, up to 90 ° (always based on the normal to the absorption layer 28) is absorbent. Therefore, the ambient light absorption layer 28 is transmissive, as in FIG Fig. 5 is indicated.
- first and second reflective layers 21 and 22 are only to be understood as an example and of course any other geometric division or segmentation can also be carried out.
- the reflective segments 23 may be squares arranged in a regular pattern, as in FIG Fig. 6 is shown.
- the reflective segments 23 can be rectangles that extend in the first direction and are spaced apart transversely thereto, as in FIG Fig. 7 is shown.
- the gaps 24 are circular and arranged in a regular pattern.
- the reflective segments 23 are squares of different sizes.
- the reflective segments are essentially at an angle to the x-direction and y-direction extending strips.
- the arrangement of the gaps need not be regular. An arrangement with different distances is also possible.
- gaps 24 and for the reflective segments 23 are possible for the gaps 24 and for the reflective segments 23 than those already described.
- Polygons, ellipses, etc. can be used as shapes. It is also not necessary to use the same shapes. Different shapes can be used for the gaps and / or segments.
- the reflective segments preferably have a reflectivity of 100% or almost 100% for visible light. However, it is also possible that they have a lower reflectivity.
- the gaps can be 100% transmissive or also have a certain reflectivity. In the latter case, the gaps would be partially transparent. In any case, the reflectivity of the gaps is always lower than the reflectivity of the reflective segments and, in the same way, the transmissivity of the gaps 24, 26 is always greater than the transmissivity of the reflective segments 23, 25.
- the reflective segments 23 have a reflectivity R2 and the gaps 24 have a reflectivity R1, the reflectivity R2 being greater than the reflectivity R1.
- R2 can have 100% or almost 100% and R1 a reflectivity of 0% or almost 0%.
- R1 and R2 are also possible. It is essential that R2 is always greater than R1.
- the transition between the reflective segments 23 and the gaps 24 does not have to be abrupt. There can be a continuous transition, as indicated by the flanks 30 in the illustration according to FIG Fig. 13 is indicated.
- the reflectivity curve can also be continuous, as in Fig. 14 is indicated.
- the reflectivity profile over the reflective segments 23 and the Gaps 24 be continuous, as in Fig. 15 is indicated. It is essential that there are sections with a higher reflectivity (reflective segments 23) and sections with a lower reflectivity (gaps 24).
- the back 15 can in particular have a curvature in order to effect a correction of the ametropia. This advantageously ensures that the represented virtual image is also sharply perceptible for the user, since the light bundles 9 are coupled out via the rear side 15, which is the correction surface for the user.
- the structure of the spectacle lens had two shells.
- a more than two-shell structure is also possible.
- a further inner shell can be provided that rests against the inner shell 20.
- both reflective layers 21 and 22 would be buried in the spectacle lens 3.
- Fig. 16 is a modification of the spectacle lens according to the invention in the same way as in FIG Fig. 2 shown, wherein in this modification the second reflective layer 22 is not provided and instead a total internal reflection takes place at the front 18.
- Fig. 17 a further modification is shown in which the spectacle lens 3 is formed as a single shell.
- Two reflective layers 21 and 22 are again provided, which in this case are arranged on the rear side 15 and the front side 18.
- the reflective facets 14 are embodied buried and preferably filled with material of the spectacle lens 3 in such a way that the front side 18 is a smooth, continuous side.
- the materials of the inner and outer shells 20 and 19 are preferably the same, so that they have an identical refractive index.
- the inner and outer shells 20 and 19 are preferably glued over their entire surface, so that a compact first spectacle lens 3 is present.
- the virtual image is reflected into the user's field of view via the first spectacle lens 3.
- the display device 1 can be designed in such a way that information or virtual images are reflected in via both spectacle lenses 3, 4. The reflection can take place in such a way that a three-dimensional image impression is created. However, this is not absolutely necessary.
- the spectacle lenses 3, 4 can have a refractive power of zero or a refractive power other than zero (in particular for correcting ametropia). As shown in the figures, both the front side 11 and the rear side 12 of the spectacle lens 3 are curved. The front side 11 can in particular be spherically curved. If the spectacle lens has a refractive power other than zero in order to correct a defective vision, the curvature of the rear side 15 is generally selected accordingly in order to achieve the corresponding correction. The rear side 15 can have a curvature deviating from the spherical shape.
- the holding device 2 need not be designed as a spectacle-like holding device. Any other type of holding device with which the display device can be placed or carried on the user's head is also possible.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
- General Health & Medical Sciences (AREA)
- Acoustics & Sound (AREA)
- Otolaryngology (AREA)
Description
Die vorliegende Erfindung betrifft ein Brillenglas für eine auf den Kopf eines Benutzers aufsetzbare und ein Bild erzeugende Anzeigevorrichtung, wobei das Brillenglas eine Vorderseite und eine Rückseite, einen Einkoppelabschnitt und einen vom Einkoppelabschnitt beabstandeten Auskoppelabschnitt sowie einen Lichtführungskanal aufweist, der dazu geeignet ist, Lichtbündel von Pixeln des erzeugten Bildes, die über den Einkoppelabschnitt des Brillenglases in das Brillenglas eingekoppelt sind, im Brillenglas bis zum Auskoppelabschnitt zu führen, von dem sie aus dem Brillenglas ausgekoppelt werden, wobei der Lichtführungskanal eine erste reflektierende Schicht aufweist, die sich vom Einkoppelabschnitt bis zum Auskoppelabschnitt erstreckt und an der die Lichtbündel zur Führung bis zum Auskoppelabschnitt reflektiert werden.The present invention relates to a spectacle lens for a display device that can be placed on the head of a user and generates an image, the spectacle lens having a front side and a rear side, a coupling-in section and a coupling-out section spaced from the coupling-in section, and a light guide channel which is suitable for capturing light bundles from pixels of the generated image, which are coupled into the spectacle lens via the coupling section of the spectacle lens, in the spectacle lens to the coupling-out section from which they are coupled out of the spectacle lens, the light guide channel having a first reflective layer that extends from the coupling section to the coupling-out section and on which the light bundles are reflected for guidance up to the coupling-out section.
Bei einem solchen Brillenglas besteht die Schwierigkeit, dass aufgrund der reflektierenden Eigenschaft der reflektierenden Schicht des Lichtführungskanals dieser für einen Benutzer sich deutlich von anderen Bereichen des Brillenglases bei Betrachtung der Umgebung durch das Brillenglas abhebt.With such a spectacle lens, there is the problem that, due to the reflective property of the reflective layer of the light guide channel, this is clearly set off for a user from other areas of the spectacle lens when viewing the surroundings through the spectacle lens.
Die
Ausgehend hiervon ist es daher Aufgabe der Erfindung, ein Brillenglas der eingangs genannten Art so weiterzubilden, dass der optisch auffallende Unterschied zwischen dem Lichtführungskanal einerseits und dem restlichen Brillenglas andererseits verringert ist. Die Aufgabe wird bei einem Brillenglas der eingangs genannten Art dadurch gelöst, dass die erste reflektierende Schicht mehrere voneinander beabstandete transparente Lücken aufweist. Somit ist die Transmissivität des Lichtführungskanals im Vergleich zu einer Lösung, bei der die reflektierende Schicht durchgehend ist, erhöht.Based on this, it is therefore the object of the invention to develop a spectacle lens of the type mentioned at the beginning in such a way that the optically striking difference between the light guide channel on the one hand and the rest of the spectacle lens on the other hand is reduced. In the case of a spectacle lens of the type mentioned at the outset, the object is achieved in that the first reflective layer has a plurality of transparent gaps spaced from one another. Thus, the transmissivity of the light guide channel is increased compared to a solution in which the reflective layer is continuous.
Bei dem erfindungsgemäßen Brillenglas kann die reflektierende Schicht segmentiert ausgebildet sein und voneinander durch die mehreren Lücken getrennte, reflektierende Segmente aufweisen.In the case of the spectacle lens according to the invention, the reflective layer can be segmented and have reflective segments separated from one another by the plurality of gaps.
Die mehreren Lücken können in einer ersten Richtung vomThe multiple gaps can be dated in a first direction
Einkoppelabschnitt zum Auskoppelabschnitt hin und/oder quer zur ersten Richtung beabstandet sein.The coupling-in section towards the coupling-out section and / or be spaced apart transversely to the first direction.
Ferner können die mehreren Lücken in einer vorbestimmten Richtung (z.B. der ersten Richtung und/oder quer dazu) äquidistant angeordnet sein. Dies ist jedoch nicht zwingend notwendig. Es können auch unregelmäßige Abstände vorliegen.Furthermore, the plurality of gaps can be arranged equidistantly in a predetermined direction (e.g. the first direction and / or transverse thereto). However, this is not absolutely necessary. There can also be irregular intervals.
Die zumindest eine Lücke kann kreisförmig, oval, oder polygonförmig ausgebildet sein. Es ist jedoch auch jede andere geometrische Form möglich.The at least one gap can be circular, oval, or polygonal. However, any other geometric shape is also possible.
Insbesondere können mehrere Lücken vorgesehen sein, die unterschiedliche Formen aufweisen.In particular, several gaps can be provided which have different shapes.
Ferner kann außerhalb des Lichtführungskanals eine winkelselektive Absorptionsschicht vor der zumindest einen Lücke der ersten reflektierenden Schicht angeordnet sein, die Licht, das unter einem Winkel aus einem Bereich von einem vorbestimmten ersten Grenzwinkel bis zu 90° auf die Absorptionsschicht trifft, absorbiert und Licht, das unter einem Winkel von 0° bis zu einem vorbestimmten zweiten Grenzwinkel, der kleiner oder gleich zum ersten Grenzwinkel ist, trifft, transmittiert. Dadurch kann z.B. ein durch die Lücke aus dem Lichtführungskanal austretendes Lichtbündel gleich absorbiert werden. Dies führt zu dem Vorteil, dass dieses Lichtbündel nicht zu unerwünschtem Streulicht führen kann, was bei einer weiteren Reflexion des Lichtbündels an z.B. einer Materialgrenzfläche in Richtung zurück zum Lichtführungskanal auftreten könnte.Furthermore, an angle-selective absorption layer can be arranged outside the light guide channel in front of the at least one gap in the first reflective layer, which absorbs light that strikes the absorption layer at an angle from a predetermined first critical angle up to 90 ° and absorbs light that falls below an angle of 0 ° up to a predetermined second critical angle, which is less than or equal to the first critical angle, is transmitted. In this way, for example, a bundle of light emerging from the light guide channel through the gap can be absorbed immediately. This has the advantage that this bundle of light cannot lead to undesired scattered light, which could occur if the bundle of light is further reflected at e.g. a material boundary in the direction back to the light guide channel.
Bei dem erfindungsgemäßen Brillenglas kann zwischen der zumindest einen Lücke und der reflektierenden Schicht ein Übergangsbereich ausgebildet sein, in dem die Reflektivität in Richtung von der Lücke bis zur reflektierenden Schicht zunimmt. Die Zunahme kann insbesondere kontinuierlich und/oder stetig sein.In the spectacle lens according to the invention, a transition region can be formed between the at least one gap and the reflective layer, in which the reflectivity increases in the direction from the gap to the reflective layer. The increase can in particular be continuous and / or constant.
Insbesondere kann der Lichtführungskanal eine der ersten reflektierenden Schicht gegenüberliegende zweite reflektierende Schicht aufweisen. Auch die zweite reflektierende Schicht kann zumindest eine transparente Lücke aufweisen.In particular, the light guide channel can have a second reflective layer opposite the first reflective layer. The second reflective layer can also have at least one transparent gap.
Insbesondere kann die zumindest eine transparente Lücke der ersten reflektierenden Schicht einer transparenten Lücke der zweiten reflektierenden Schicht gegenüberliegen.In particular, the at least one transparent gap in the first reflective layer can be opposite a transparent gap in the second reflective layer.
Ferner können die beiden gegenüberliegenden reflektierenden Schichten gleich ausgebildet sein. Insbesondere können sie deckungsgleich ausgebildet sein.Furthermore, the two opposing reflective layers can be formed identically. In particular, they can be designed to be congruent.
Die erste reflektierende Schicht kann plan oder gekrümmt ausgebildet sein. Das gleiche gilt für die zweite reflektierende Schicht.The first reflective layer can be planar or curved. The same is true for the second reflective layer.
Die reflektierende Schicht ist insbesondere eine Spiegelschicht, die eine Reflektivität von 100 % oder nahezu 100 % für sichtbares Licht aufweist. Es ist jedoch auch möglich, dass die reflektierende Schicht als teiltransparente Schicht ausgebildet ist.The reflective layer is in particular a mirror layer which has a reflectivity of 100% or almost 100% for visible light. However, it is also possible for the reflective layer to be designed as a partially transparent layer.
Die zumindest eine Lücke kann bevorzugt eine Transmission von 100 % oder nahezu 100 % für Licht aus dem sichtbaren Wellenlängenbereich aufweisen. Es ist jedoch auch möglich, dass die transmissive Lücke als teiltransparente Schicht ausgebildet ist, die eine gewisse reflektierende Eigenschaft aufweist. Auf jeden Fall ist jedoch die reflektierende Eigenschaft der transmissiven Lücke geringer als die der reflektierenden Schicht. Die Reflektivität der reflektierenden Schicht ist somit stets höher als die Reflektivität der Lücke bzw. Lücken.The at least one gap can preferably have a transmission of 100% or almost 100% for light from the visible wavelength range. However, it is also possible for the transmissive gap to be designed as a partially transparent layer which has a certain reflective property. In any case, however, the reflective property of the transmissive gap is lower than that of the reflective layer. The reflectivity of the reflective layer is therefore always higher than the reflectivity of the gap or gaps.
Sowohl die reflektierende Schicht als auch der Bereich der Lücken kann jeweils als metallische Schicht bzw. metallische Beschichtung ausgebildet sein. Es ist auch möglich, dass die reflektierende Schicht sowie die Lücken so ausgebildet sind, dass eine polarisationsabhängige Reflexion vorliegt. Insbesondere können Lichtbündel eines ersten Polarisationszustandes reflektiert (zumindest zum Teil reflektiert) und eines zweiten Polarisationszustandes, der orthogonal zum ersten Polarisationszustand ist, transmittiert werden.Both the reflective layer and the region of the gaps can each be designed as a metallic layer or metallic coating. It is also possible for the reflective layer and the gaps to be formed in such a way that a polarization-dependent reflection is present. In particular, light bundles of a first polarization state can be reflected (at least partially reflected) and a second polarization state that is orthogonal to the first polarization state can be transmitted.
Bei dem erfindungsgemäßen Brillenglas können die Vorderseite und/oder die Rückseite gekrümmt ausgebildet sein. Insbesondere kann die Rückseite eine Krümmung aufweisen, die so gewählt ist, dass eine Fehlsichtigkeitskorrektur bewirkt wird. Dies führt zu dem Vorteil, dass auch für die ausgekoppelten Lichtbündel die gewünschte Fehlsichtigkeitskorrektur vorliegt, da diese so ausgekoppelt werden, dass sie über die Rückseite aus dem Brillenglas austreten.In the case of the spectacle lens according to the invention, the front side and / or the rear side can be curved. In particular, the rear side can have a curvature which is selected in such a way that ametropia correction is effected. This leads to the advantage that the desired ametropia correction is also present for the coupled out light bundles, since these are coupled out in such a way that they exit the spectacle lens via the rear side.
Das erfindungsgemäße Brillenglas kann mehrschalig ausgebildet sein und z.B. eine Innenschale und eine Außenschale aufweisen. Insbesondere sind die Innen- und Außenschale aus den gleichen Materialien gebildet.The spectacle lens according to the invention can have multiple shells and, for example, have an inner shell and an outer shell. In particular, the inner and outer shells are made from the same materials.
Des weiteren kann die Innenschale mit der Außenschale flächig verbunden sein (z.B. verklebt oder verkittet mit einem optischen Kitt oder optischen Kleber).Furthermore, the inner shell can be connected to the outer shell over a large area (e.g. glued or cemented with an optical cement or optical adhesive).
Bevorzugt sind die einander zu weisenden Seiten von Innen- und Außenschale zueinander komplementär ausgebildet.The sides of the inner and outer shell that face one another are preferably designed to be complementary to one another.
Insbesondere können diese einander zu weisenden Seiten sphärisch gekrümmt sein.In particular, these sides facing each other can be spherically curved.
Des weiteren kann die Außenseite und/oder die Innenseite sphärisch gekrümmt sein.Furthermore, the outside and / or the inside can be spherically curved.
Natürlich können auch mehr als zwei Schalen vorgesehen sein.Of course, more than two shells can also be provided.
Der Auskoppelabschnitt kann mehrere nebeneinander angeordnete reflektive Umlenkflächen aufweisen. Die reflektiven Umlenkflächen können auch als reflektive Facetten bezeichnet werden. Sie können eine Reflektivität von nahezu 100 % aufweisen und in diesem Fall als Spiegelflächen bezeichnet werden. Es ist auch möglich, dass sie eine geringere Reflektivität aufweisen und somit teiltransparent ausgebildet sind.The coupling-out section can have a plurality of reflective deflecting surfaces arranged next to one another. The reflective deflecting surfaces can also be referred to as reflective facets. They can have a reflectivity of almost 100% and in this case are referred to as mirror surfaces. It is also possible that they have a lower reflectivity and are thus designed to be partially transparent.
Die reflektiven Umlenkflächen können jeweils plan oder gekrümmt ausgebildet sein. Ferner können die Umlenkflächen fresnelartig eine gekrümmte Reflexionsfläche nachstellen, die neben einer reiner Strahlumlenkung auch eine abbildende Eigenschaft aufweist.The reflective deflecting surfaces can each be designed to be planar or curved. Furthermore, the deflection surfaces can simulate a curved reflection surface in a Fresnel-like manner, which in addition to a pure beam deflection also has an imaging property.
Der Auskoppelabschnitt kann im Brillenglas vergraben sein. Insbesondere kann der Auskoppelabschnitt so ausgebildet sein, dass die Vorderseite des Brillenglases eine glatte, durchgehende Fläche ist.The coupling-out section can be buried in the spectacle lens. In particular, the coupling-out section can be designed such that the front side of the spectacle lens is a smooth, continuous surface.
Der Einkoppelabschnitt kann in einem Randbereich des Brillenglases und der Auskoppelabschnitt kann in einem Mittelbereich des Brillenglases ausgebildet sein.The coupling-in section can be formed in an edge region of the spectacle lens and the coupling-out section can be formed in a central region of the spectacle lens.
Die Innenschale und die Außenschale (und eventuelle weitere Schalen) können jeweils einstückig ausgebildet sein. Es ist jedoch auch möglich, dass die Innenschale und/oder die Außenschale (und/oder eventuelle weitere Schalen) mehrstückig ausgebildet ist.The inner shell and the outer shell (and any other shells) can each be formed in one piece. However, it is also possible for the inner shell and / or the outer shell (and / or any further shells) to be formed in several pieces.
Es wird ferner eine Anzeigevorrichtung mit einer auf den Kopf eines Benutzers aufsetzbaren Haltevorrichtung, einem an der Haltevorrichtung befestigten Bilderzeugungsmodul, das ein Bild erzeugt, und einer an der Haltevorrichtung befestigten Abbildungsoptik, die ein Brillenglas nach einem der obigen Ansprüche aufweist und die das erzeugte Bild im auf dem Kopf des Benutzers aufgesetzten Zustand der Haltevorrichtung so abbildet, dass es der Benutzer als virtuelles Bild wahrnehmen kann, bereitgestellt.There is also a display device with a holding device that can be placed on the head of a user, an image generation module attached to the holding device that generates an image, and imaging optics attached to the holding device, which has a spectacle lens according to one of the above claims and which contains the generated image maps the state of the holding device placed on the user's head in such a way that the user can perceive it as a virtual image.
Die Abbildungsoptik kann das Brillenglas als einziges optisches Element aufweisen. Es ist jedoch auch möglich, dass die Abbildungsoptik neben dem Brillenglas noch zumindest ein weiteres optisches Element umfaßt. Insbesondere kann die Außenschale zusammen mit dem zumindest einem weiteren optischen Element einstückig ausgebildet sein. Alternativ ist es möglich, dass die Außenschale mit dem zumindest einen weiteren optischen Element (z.B. durch Verkitten oder Verkleben) verbunden ist. Ferner kann das zumindest eine weitere optische Element von der Außenschale beabstandet sein.The imaging optics can have the spectacle lens as the only optical element. However, it is also possible for the imaging optics to include at least one further optical element in addition to the spectacle lens. In particular, the outer shell can be formed in one piece together with the at least one further optical element. Alternatively, it is possible that the outer shell with the at least one further optical element (e.g. by cementing or gluing). Furthermore, the at least one further optical element can be spaced apart from the outer shell.
Das zumindest eine weitere optische Element kann z.B. eine Kollimationsoptik sein, die zwischen dem Brillenglas und dem Bilderzeugungsmodul angeordnet ist, so dass die Lichtbündel vom Bilderzeugungsmodul als kollimierte Bündel in das Brillenglas eingekoppelt werden können.The at least one further optical element can be, for example, collimation optics, which are arranged between the spectacle lens and the image generation module, so that the light bundles from the image generation module can be coupled into the spectacle lens as collimated bundles.
Ferner kann die Anzeigevorrichtung eine Steuereinheit aufweisen, die das Bilderzeugungsmodul ansteuert.Furthermore, the display device can have a control unit which controls the image generation module.
Das Bilderzeugungsmodul kann insbesondere einen flächigen Bildgeber aufweisen, wie z.B. ein LCD-Modul, ein LCoS-Modul, ein OLED-Modul oder eine Kippspiegelmatrix. Der Bildgeber kann eine Mehrzahl von Pixeln aufweisen, die z.B. in Zeilen und Spalten angeordnet sein können. Der Bildgeber kann selbstleuchtend oder nicht selbstleuchtend sein.The image generation module can in particular have a planar image generator, such as an LCD module, an LCoS module, an OLED module or a tilting mirror matrix. The imager may have a plurality of pixels that may be arranged in rows and columns, for example. The imager can be self-luminous or non-self-luminous.
Das Bilderzeugungsmodul kann insbesondere so ausgebildet sein, dass es ein monochromatisches oder ein mehrfarbiges Bild erzeugt.The image generation module can in particular be designed in such a way that it generates a monochromatic or a multicolor image.
Die erfindungsgemäße Anzeigevorrichtung kann weitere, dem Fachmann bekannte Elemente aufweisen, die zu ihrem Betrieb notwendig sind.The display device according to the invention can have further elements known to the person skilled in the art which are necessary for its operation.
Es versteht sich, daß die vorstehend genannten und die nachstehend noch zu erläuternden Merkmale nicht nur in den angegebenen Kombinationen, sondern auch in anderen Kombinationen oder in Alleinstellung einsetzbar sind, ohne den Rahmen der vorliegenden Erfindung zu verlassen.It goes without saying that the features mentioned above and those yet to be explained below can be used not only in the specified combinations but also in other combinations or on their own without departing from the scope of the present invention.
Nachfolgend wird die Erfindung beispielsweise anhand der beigefügten Zeichnungen, die auch erfindungswesentliche Merkmale offenbaren, noch näher erläutert. Es zeigen:
- Fig. 1
- eine schematische perspektivische Darstellung einer Ausführungsform der erfindungsgemäßen Anzeigevorrichtung;
- Fig. 2
- eine vergrößerte Teilschnittansicht des ersten Brillenglases 3 einschließlich einer schematischen Darstellung des Bilderzeugungsmoduls;
- Fig. 3
- eine schematische vergrößerte Ansicht auf die
Rückseite 15 des erfindungsgemäßen Brillenglases im Bereich des Lichtführungskanals 12 und des Auskoppelabschnitts 13; - Fig. 4
- eine schematische vergrößerte Schnittansicht gemäß
Fig. 2 durch den Lichtführungskanal 12, wo zur Vereinfachung der Darstellung die Vorder- 18, 15, dieund Rückseite 21, 22 und derreflektierenden Schichten Auskoppelabschnitt 13 geradlinig und nicht gekrümmt dargestellt sind; - Fig. 5
- eine Abwandlung des erfindungsgemäßen Brillenglases in einer Schnittdarstellung gemäß
Fig. 4 ; - Fig. 6
- eine Abwandlung des erfindungsgemäßen Brillenglases in einer Ansicht gemäß
Fig. 3 ; - Fig. 7
- eine Abwandlung des erfindungsgemäßen Brillenglases in einer Ansicht gemäß
Fig. 3 ; - Fig. 8
- eine Abwandlung des erfindungsgemäßen Brillenglases in einer Ansicht gemäß
Fig. 3 ; - Fig. 9
- eine Abwandlung des erfindungsgemäßen Brillenglases in einer Ansicht gemäß
Fig. 3 ; - Fig. 10
- eine Abwandlung des erfindungsgemäßen Brillenglases in einer Ansicht gemäß
Fig. 3 ; - Fig. 11
- eine Abwandlung des erfindungsgemäßen Brillenglases in einer Ansicht gemäß
Fig. 3 ; - Fig. 12
- eine Darstellung des Reflexionsverlaufs der ersten reflektierenden Schicht 21 in der y-Richtung;
- Fig. 13
- eine Darstellung des Reflexionsverlaufs einer Weiterbildung der ersten reflektierenden Schicht 21 in der y-Richtung;
- Fig. 14
- eine Darstellung des Reflexionsverlaufs einer Weiterbildung der ersten reflektierenden Schicht 21 in der y-Richtung;
- Fig. 15
- eine Darstellung des Reflexionsverlaufs einer Weiterbildung der ersten reflektierenden Schicht 21 in der y-Richtung;
- Fig. 16
- eine weitere Ausführungsform des erfindungsgemäßen Brillenglases in einer Schnittansicht gemäß
Fig. 2 , und - Fig. 17
- eine weitere Ausführungsform des erfindungsgemäßen Brillenglases in einer Schnittansicht gemäß
Fig. 2 .
- Fig. 1
- a schematic perspective illustration of an embodiment of the display device according to the invention;
- Fig. 2
- an enlarged partial sectional view of the
first spectacle lens 3 including a schematic illustration of the image generation module; - Fig. 3
- a schematic enlarged view of the
rear side 15 of the spectacle lens according to the invention in the area of thelight guide channel 12 and the coupling-outsection 13; - Fig. 4
- a schematic enlarged sectional view according to
Fig. 2 through thelight guide channel 12, where, in order to simplify the illustration, the front and 18, 15, therear sides 21, 22 and the coupling-outreflective layers section 13 are shown as straight and not curved; - Fig. 5
- a modification of the spectacle lens according to the invention in a sectional view according to FIG
Fig. 4 ; - Fig. 6
- a modification of the spectacle lens according to the invention in a view according to FIG
Fig. 3 ; - Fig. 7
- a modification of the spectacle lens according to the invention in a view according to FIG
Fig. 3 ; - Fig. 8
- a modification of the spectacle lens according to the invention in a view according to FIG
Fig. 3 ; - Fig. 9
- a modification of the spectacle lens according to the invention in a view according to FIG
Fig. 3 ; - Fig. 10
- a modification of the spectacle lens according to the invention in a view according to FIG
Fig. 3 ; - Fig. 11
- a modification of the spectacle lens according to the invention in a view according to FIG
Fig. 3 ; - Fig. 12
- a representation of the reflection profile of the first
reflective layer 21 in the y-direction; - Fig. 13
- a representation of the reflection profile of a development of the first
reflective layer 21 in the y direction; - Fig. 14
- a representation of the reflection profile of a development of the first
reflective layer 21 in the y direction; - Fig. 15
- a representation of the reflection profile of a development of the first
reflective layer 21 in the y direction; - Fig. 16
- a further embodiment of the spectacle lens according to the invention in a sectional view according to FIG
Fig. 2 , and - Fig. 17
- a further embodiment of the spectacle lens according to the invention in a sectional view according to FIG
Fig. 2 .
Bei der in
Dazu umfaßt die Anzeigevorrichtung 1 ein Bilderzeugungsmodul 5, das im Bereich des rechten Brillenbügels der Haltevorrichtung 2 angeordnet sein kann, wie in
Die Brillengläser 3 und 4 und insbesondere das erste Brillenglas 3 sind nur beispielshalber zusammen mit der erfindungsgemäßen Anzeigevorrichtung 1 beschrieben. Die Brillengläser 3, 4 bzw. zumindest das erste Brillenglas 3 sind jeweils für sich als erfindungsgemäßes Brillenglas 3, 4 oder als erfindungsgemäßes optisches Element ausgebildet. Das erfindungsgemäße optische Element kann auch in anderem Zusammenhang als mit der hier beschriebenen Anzeigevorrichtung 1 eingesetzt werden. Daher kann das optische Element, wenn es als Brillenglas ausgebildet ist, natürlich auch als zweites Brillenglas 4 ausgebildet sein.The
Wie am besten aus der vergrößerten, schematischen Teilschnittansicht in
Von jedem Pixel des Bildgebers 6 kann ein Lichtbündel 9 ausgehen. Durch eine entsprechende Ansteuerung der Pixel des Bildgebers 6 mittels einer Steuereinheit 10, die Teil des Bilderzeugungsmoduls 5 sein kann, kann das gewünschte Bild erzeugt werden. In
Der vom Bildgeber 6 ausgehende Lichtstrahl 9 läuft durch das Optikelement 8 und tritt über einen Einkoppelabschnitt 11 (hier die Stirnseite des ersten Brillenglases 3) in das erste Brillenglas 3 ein und wird in diesem entlang eines Lichtführungskanals 12 bis zu einem Auskoppelabschnitt 13 geführt. Der Auskoppelabschnitt 13 weist mehrere nebeneinander angeordnete reflektive Umlenkflächen 14 (die auch als reflektive Facetten bezeichnet werden können) auf, an denen eine Reflexion der Lichtstrahlen 9 in Richtung zu einer Rückseite 15 des ersten Brillenglases 3 stattfindet, so dass die Lichtstrahlen 9 über die Rückseite 15 aus dem ersten Brillenglas 3 austreten.The
Somit kann ein Benutzer, wenn er die erfindungsgemäße Anzeigevorrichtung 1 bestimmungsgemäß auf dem Kopf trägt, das mittels des Bildgebers 6 erzeugte Bild als virtuelles Bild wahrnehmen, wenn er auf den Auskoppelabschnitt 13 blickt. Bei der hier beschriebenen Ausführungsform muß der Benutzer bezogen auf die Blickrichtung G eines Geradeausblicks um ca. 40° nach rechts schauen. In
Obwohl bei der beschriebenen Ausführungsform die Einkopplung über die Stirnseite des ersten Brillenglases 3 durchgeführt ist und somit der Einkoppelabschnitt 11 auf der Stirnseite des ersten Brillenglases 3 ausgebildet ist, ist es auch möglich, eine Einkopplung über die Rückseite 15 des ersten Brillenglases durchzuführen.Although in the described embodiment the coupling is carried out via the end face of the
Wie in der schematischen Darstellung in
Das erste Brillenglas 3 ist ferner zweischalig ausgebildet und umfaßt eine Außenschale 19 sowie eine Innenschale 20.The
Der Lichtführungskanal 12 weist zwei gegenüberliegende reflektierende Schichten 21, 22 auf, die sich jeweils vom Einkoppelabschnitt 11 bis zum Auskoppelabschnitt 13 erstrecken. Die erste reflektierende Schicht 21 ist auf der Rückseite 15 ausgebildet. Die zweite reflektierende Schicht 22 ist zwischen der Innenschale 20 und der Außenschale 19 ausgebildet.The
Wie insbesondere der vergrößerten Ansicht auf die Rückseite 15 des Brillenglases 3 gemäß
In der schematischen, vergrößerten Schnittansicht in
Wie in
Ferner kann aufgrund der vorgesehenen Lücken 24, 26 Umgebungslicht 27 durch den Lichtführungskanal 12 hindurchlaufen und vom Benutzer bei aufgesetzter Anzeigevorrichtung 1 wahrgenommen werden.Furthermore, due to the provided
Die reflektierenden Schichten 21, 22, die Vorderseite 18, die Rückseite 15 und der Auskoppelabschnitt 13 sind zur Vereinfachung der Darstellung in
Bei dem erfindungsgemäßen Brillenglas 3 kann somit durch die Größe und Anordnung der reflektierenden Segmente 23, 25 und somit durch die Größe und Anordnungen der Lücken 24, 26 die Transmission des Lichtführungskanals 12 eingestellt werden. Somit ist für einen Benutzer selbst im Bereich des Lichtführungskanals 12 noch die Umgebung wahrnehmbar.In the case of the
Die Transmission durch den Lichtführungskanal ergibt sich im wesentlichen aus dem Verhältnis der Fläche der reflektierenden Segmente 23 bzw. 25 zur Fläche der Lücken 24 bzw. 26 sowie aus der relativen Anordnung der reflektierenden Segmente 23 der ersten reflektierenden Schicht zu den reflektierenden Segmenten der zweiten reflektierenden Schicht 22.The transmission through the light guide channel results essentially from the ratio of the area of the
In
Die beschriebene Segmentierung der ersten und zweiten reflektierenden Schicht 21 und 22 ist nur beispielhaft zu verstehen und natürlich kann auch jede andere geometrische Aufteilung bzw. Segmentierung durchgeführt werden.The described segmentation of the first and second
So können die reflektierenden Segmente 23 beispielsweise Quadrate sein, die in einem regelmäßigen Muster angeordnet sind, wie in
Es ist auch möglich, dass die reflektierenden Segmente 23 Rechtecke sind, die sich in der ersten Richtung erstrecken und quer dazu beabstandet sind, wie in
Bei der Variante gemäß
Es ist auch möglich, die Lücken trapezförmig auszubilden und entsprechend anzuordnen wie in
Bei der in
Bei der in
Natürlich muß die Anordnung der Lücken nicht regelmäßig sein. Es ist auch eine Anordnung mit unterschiedlichen Abständen möglich.Of course, the arrangement of the gaps need not be regular. An arrangement with different distances is also possible.
Ferner sind andere Formen für die Lücken 24 sowie für die reflektiven Segmente 23 möglich, als die die schon beschrieben wurden. So können Polygone, Ellipsen, etc. als Formen verwendet werden. Es müssen auch nicht gleiche Formen verwendet werden. Es können unterschiedliche Formen für die Lücken und/oder Segmente eingesetzt werden.Furthermore, other shapes are possible for the
Die reflektierenden Segmente haben bevorzugt eine Reflektivität von 100 % oder nahezu 100 % für sichtbares Licht. Es ist jedoch auch möglich, dass sie eine geringere Reflektivität aufweisen.The reflective segments preferably have a reflectivity of 100% or almost 100% for visible light. However, it is also possible that they have a lower reflectivity.
Die Lücken können zu 100 % transmissiv sein oder auch eine gewisse Reflektivität aufweisen. In letzterem Fall wären die Lücken teiltransparent. Auf jeden Fall ist die Reflektivität der Lücken stets geringer als die Reflektivität der reflektierenden Segmente und in gleicher Weise ist die Transmissivität der Lücken 24, 26 stets größer als die Transmissivität der reflektierenden Segmente 23, 25.The gaps can be 100% transmissive or also have a certain reflectivity. In the latter case, the gaps would be partially transparent. In any case, the reflectivity of the gaps is always lower than the reflectivity of the reflective segments and, in the same way, the transmissivity of the
Bisher wurde davon ausgegangen, dass der Übergang zwischen den reflektierenden Segmenten 23 und den Lücken 24 sprungartig ist. Dies ist für die Ausführungsform gemäß
In einer Weiterbildung muß der Übergang zwischen den reflektierenden Segmenten 23 und den Lücken 24 nicht sprungartig sein. Es kann ein kontinuierlicher Übergang vorliegen, wie durch die Flanken 30 in der Darstellung gemäß
Bei dieser Ausführungsform ist zwar schon ein kontinuierlicher Übergang vorhanden. Jedoch fängt dieser an den reflektierenden Segmenten 23 und den Lücken 24 plötzlich oder abrupt an, so dass der Reflektivitätsverlauf an diesen Stellen einen Knick aufweist und nicht kontinuierlich ist.In this embodiment there is already a continuous transition. However, this begins suddenly or abruptly at the
Natürlich kann der Reflektivitätsverlauf auch kontinuierlich sein, wie in
Die in Verbindung mit
Bei dem erfindungsgemäßen Brillenglas 2 kann die Rückseite 15 insbesondere eine Krümmung aufweisen, um eine Fehlsichtigkeitskorrektur zu bewirken. Damit wird in vorteilhafter Weise erreicht, dass auch das dargestellte virtuelle Bild für den Benutzer scharf wahrnehmbar ist, da die Auskopplung der Lichtbündel 9 über die Rückseite 15, die die Korrekturfläche für den Benutzer ist, erfolgt.In the case of the
Bei der bisher beschriebenen Ausführungsform war der Aufbau des Brillenglases zweischalig. Es ist auch ein mehr als zweischaliger Aufbau möglich. Beispielsweise kann eine weitere Innenschale vorgesehen sein, die an der Innenschale 20 anliegt. In diesem Fall wären beide reflektierende Schichten 21 und 22 im Brillenglas 3 vergraben.In the embodiment described so far, the structure of the spectacle lens had two shells. A more than two-shell structure is also possible. For example, a further inner shell can be provided that rests against the
In
In
Die Materialien der Innen- und Außenschale 20 und 19 sind bevorzugt gleich, so dass sie einen identischen Brechungsindex aufweisen. Die Innen- und Außenschalle 20 und 19 sind bevorzugt ganzflächig verklebt, so dass ein kompaktes erstes Brillenglas 3 vorliegt.The materials of the inner and
Bei der erfindungsgemäßen Anzeigevorrichtung 1 erfolgt die Einspiegelung des virtuellen Bildes in das Gesichtsfeld des Benutzers über das erste Brillenglas 3. Natürlich ist auch eine Einspiegelung über das zweite Brillenglas 4 möglich. Des weiteren kann die Anzeigevorrichtung 1 so ausgebildet sein, dass Informationen bzw. virtuelle Bilder über beide Brillengläser 3, 4 eingespiegelt werden. Dabei kann die Einspiegelung so erfolgen, dass ein dreidimensionaler Bildeindruck entsteht. Dies ist jedoch nicht zwingend notwendig.In the case of the
Die Brillengläser 3, 4 können eine Brechkraft von Null oder eine von Null verschiedene Brechkraft (insbesondere zur Korrektur von Fehlsichtigkeiten) aufweisen. Wie in den Figuren gezeigt ist, sind sowohl die Vorderseite 11 als auch die Rückseite 12 des Brillenglases 3 gekrümmt ausgebildet. Die Vorderseite 11 kann insbesondere sphärisch gekrümmt sein. Wenn das Brillenglas eine von Null verschiedene Brechkraft aufweist, um eine Fehlsichtigkeit zu korrigieren, ist in der Regel die Krümmung der Rückseite 15 entsprechend gewählt, um die entsprechende Korrektur zu erreichen. Die Rückseite 15 kann eine von der sphärischen Form abweichende Krümmung aufweisen.The
Die Haltevorrichtung 2 muß nicht als brillenartige Haltevorrichtung ausgebildet sein. Es ist auch jede andere Art der Haltevorrichtung möglich, mit der ein Aufsetzen oder Tragen der Anzeigevorrichtung auf dem Kopf des Benutzers erfolgen kann.The holding
Claims (13)
- Spectacle lens for a display device (1) that can be fitted on the head of a user and generates an image,
wherein the spectacle lens (3) comprises a front side (18) and a rear side (15),
a coupling-in section (11) and a coupling-out section (13) spaced apart from the coupling-in section (11), as well as
a light guiding channel (12) which is suitable for guiding light bundles (9) of pixels of the generated image, which are coupled into the spectacle lens (3) via the coupling-in section (11) of the spectacle lens (3), in the spectacle lens (3) to the coupling-out section (13), by which they are coupled out of the spectacle lens (3),
wherein the light guiding channel (12) comprises a first reflecting layer (21, 22), which extends from the coupling-in section (11) to the coupling-out section (13) and on which the light bundles (9) are reflected for guiding to the coupling-out section (13),
characterized in that
the first reflecting layer (21, 22) comprises several transparent gaps (24, 26) spaced apart from each another for increasing the transmissivity of the light guiding channel (12). - Spectacle lens according to claim 1, characterized in that the several gaps (24, 26) are spaced apart in a first direction from the coupling-in section (11) towards the coupling-out section (13) and/or transverse to the first direction.
- Spectacle lens according to claim 1 or 2, characterized in that the several gaps (24, 26) are arranged equidistantly in a predetermined direction.
- Spectacle lens according to one of the above claims, characterized in that the at least one gap (24, 26) is formed in the shape of a circle, oval or polygon.
- Spectacle lens according to one of the above claims, characterized in that the first reflecting layer (21, 22) is formed segmented with transparent gaps (24, 26).
- Spectacle lens according to one of the above claims, characterized in that, outside of the light guiding channel (12), an angle-selective absorption layer (28) is arranged in front of the at least one gap (24, 26) of the first reflecting layer (21, 22), which absorption layer absorbs light which strikes the absorption layer at an angle from a range from a predetermined first critical angle up to 90° and transmits light which strikes at an angle of from 0° up to a predetermined second critical angle, wherein the second critical angle is smaller than or equal to the first critical angle.
- Spectacle lens according to one of the above claims, characterized in that, between the at least one gap (24, 26) and the reflecting layer (21, 22), a transition region (30) is present, in which the reflectivity increases in the direction from the gap (24, 26) to the reflecting layer (21, 22).
- Spectacle lens according to one of the above claims, characterized in that the light guiding channel (12) comprises a second reflecting layer (22, 21) which is opposite the first reflecting layer (21, 22).
- Spectacle lens according to claim 8, characterized in that the second reflecting layer (22, 21) comprises at least one transparent gap (26, 24).
- Spectacle lens according to claim 9, characterized in that at least one transparent gap (24, 26) of the first reflecting layer (21, 22) is opposite a transparent gap (24, 26) of the second reflecting layer (22, 21).
- Spectacle lens according to one of the above claims, characterized in that the coupling-out section (13) comprises several reflective deflecting surfaces (14) arranged next to each other.
- Spectacle lens according to one of the above claims, characterized in that the coupling-out section (13) is formed buried in the spectacle lens (3).
- Display device with
a holder (2) that can be fitted on the head of a user,
an image-generating module (5) secured to the holder (2), which generates an image, and
an imaging optical system (7) secured to the holder (2), which comprises a spectacle lens (3) according to one of the above claims and which, when the holder (2) is fitted on the head of the user, images the generated image in such a way that the user can perceive it as a virtual image.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201410207500 DE102014207500B3 (en) | 2014-04-17 | 2014-04-17 | Spectacle lens for a display device that can be placed on the head of a user and forms an image |
PCT/EP2015/058279 WO2015158834A1 (en) | 2014-04-17 | 2015-04-16 | Eyeglass lens for a display device, which display device can be placed on the head of a user and produces an image |
Publications (2)
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EP3132302A1 EP3132302A1 (en) | 2017-02-22 |
EP3132302B1 true EP3132302B1 (en) | 2021-01-13 |
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EP15717859.1A Active EP3132302B1 (en) | 2014-04-17 | 2015-04-16 | Eyeglass lens for a display device, which display device can be placed on the head of a user and produces an image |
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US (1) | US9989768B2 (en) |
EP (1) | EP3132302B1 (en) |
KR (1) | KR102386971B1 (en) |
CN (1) | CN106461941B (en) |
DE (1) | DE102014207500B3 (en) |
WO (1) | WO2015158834A1 (en) |
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DE102015102032A1 (en) * | 2015-02-12 | 2016-08-18 | Carl Zeiss Jena Gmbh | Optical element |
DE102015122131B3 (en) * | 2015-12-17 | 2017-03-02 | Carl Zeiss Smart Optics Gmbh | Spectacle lens for a display device which can be placed on the head of a user and generates an image, and a display device with such a spectacle lens |
DE102015122302B4 (en) | 2015-12-18 | 2021-10-07 | tooz technologies GmbH | Ophthalmic optical element, glasses, head-mounted display device, computer-implemented method for designing an ophthalmic optical element, method for manufacturing an ophthalmic optical element and computer program product |
IL244177B (en) | 2016-02-18 | 2021-04-29 | Oorym Optics Ltd | Compact display system having uniform image |
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DE102017125731A1 (en) | 2017-11-03 | 2019-05-09 | Carl Zeiss Ag | Optical fiber, imaging device and HMD with separate imaging channels |
US10989921B2 (en) * | 2017-12-29 | 2021-04-27 | Letinar Co., Ltd. | Augmented reality optics system with pinpoint mirror |
US10989922B2 (en) * | 2017-12-29 | 2021-04-27 | Letinar Co., Ltd. | Augmented reality optics system with pin mirror |
CN108169842B (en) * | 2018-01-02 | 2020-06-26 | 京东方科技集团股份有限公司 | Waveguide assembly for intelligent display wearable device and intelligent display wearable device |
KR102303641B1 (en) * | 2018-12-26 | 2021-09-17 | 주식회사 레티널 | Optical device for augmented reality |
KR102282422B1 (en) * | 2019-11-01 | 2021-07-27 | 주식회사 레티널 | Compact type optical device for augmented reality which can prevent ghost images with wide field of view |
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- 2015-04-16 KR KR1020167026416A patent/KR102386971B1/en active IP Right Grant
- 2015-04-16 US US15/304,849 patent/US9989768B2/en active Active
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- 2015-04-16 EP EP15717859.1A patent/EP3132302B1/en active Active
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CN106461941A (en) | 2017-02-22 |
CN106461941B (en) | 2019-07-05 |
DE102014207500B3 (en) | 2015-05-07 |
US20170184851A1 (en) | 2017-06-29 |
WO2015158834A1 (en) | 2015-10-22 |
EP3132302A1 (en) | 2017-02-22 |
KR20160144983A (en) | 2016-12-19 |
KR102386971B1 (en) | 2022-04-14 |
US9989768B2 (en) | 2018-06-05 |
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